Hello,
If a [clear( message is sent to the 1st inlet of vcf~ the main window prints a /no method for 'clear'/ message, both in Pd 0.54.0 and Pd 0.54.1 (on Linux). The clear message is mentioned in the reference subpatch of the vcf~-help patch (also on the iem website with an overview of all Pd objects and help files).
best, Hans